Class D Water Operator License Exam
TCEQ
True or False: In Texas, approximately 75% of all water is used for commercial, industrial,
or agricultural purposes. - ANS- True
What percentage of Earth's surface is covered by water? - ANS- 71%
Define drought: An extended period when a region experiences a deficiency in its water
supply, which can be atmospheric, ground, or surface water. - ANS-
True or False: Only about 1 gallon of tap water per person per day is used for drinking
and cooking. - ANS- True
Excluding outside water use, how many gallons of water does the average household
use per month for inside use? - ANS- 2,000
True or False: Only 1% of all the fresh water on earth can be easily accessed for use. -
ANS- False (only 1%)
True or False: In 1978, the Texas Department of Health (TDH) took over primacy of the
Safe Drinking Water Act from the EPA. - ANS- True
True or False: Public Water System (PWS) officials should take a proactive approach to
terrorism. - ANS- True
What legal concept permits the owner of a well to pump as much water as desired, even
if the water is drained from beneath the land of others? - ANS- Rule of Capture
In Texas, what percentage of the total water used is accounted for by agricultural water
demand? - ANS- 57%
True or False: A rural school is an example of a non-transient non-community PWS. -
ANS- True
What does monitoring average and maximum daily water enable us to plan ahead for? -
ANS- Demand
, True or False: The Safe Drinking Water Act establishes standards for physical, chemical,
bacteriological, and radiological characteristics of drinking water. - ANS- True
Define 'potable' in relation to water safety and chlorine. - ANS- Residual
What is the responsibility of a plant operator in ensuring drinking water quality? - ANS-
Palatable
True or False: Utilities providing fire protection must have a minimum of 130 gallons of
water per person per day according to the Texas State Board of Fire Insurance. - ANS-
False
True or False: The TCEQ is the primary state regulator of water utilities. - ANS- True
True or False: All PWS, regardless of water source, must be supervised by a licensed
water works operator. - ANS- True
How do meter readers impact revenue and community relations? - ANS- Public
Who is the federal regulator of drinking water? - ANS- EPA
T/F: Duties of Distribution Operator include repairing leaks, making taps, flushing mains,
and taking radiological samples. - ANS- False (Repair leaks, Make taps, Flush mains,
Operate pumps, Take *bacteriological* samples)
Estimate the population of a service area with 1000 service connections. - ANS- 3,000
(multiply connections x 3)
T/F: The State must be notified before an existing facility is changed or after construction
of a new facility. - ANS- False (must notify *before*)
T/F: A Class 'D' license is valid for 3 years at ground and purchase water systems with
250 connections or less. - ANS- False (3 years)
T/F: The physical characteristics of water include color, taste, odor, temperature, and
turbidity. - ANS- True
What pH value indicates an alkaline or basic solution? - ANS- 7
T/F: The terms mg/L and ppm are interchangeable. - ANS- False (they are not
interchangeable)
Can suspended solids in water be filtered out? - ANS- False (they can)
TCEQ
True or False: In Texas, approximately 75% of all water is used for commercial, industrial,
or agricultural purposes. - ANS- True
What percentage of Earth's surface is covered by water? - ANS- 71%
Define drought: An extended period when a region experiences a deficiency in its water
supply, which can be atmospheric, ground, or surface water. - ANS-
True or False: Only about 1 gallon of tap water per person per day is used for drinking
and cooking. - ANS- True
Excluding outside water use, how many gallons of water does the average household
use per month for inside use? - ANS- 2,000
True or False: Only 1% of all the fresh water on earth can be easily accessed for use. -
ANS- False (only 1%)
True or False: In 1978, the Texas Department of Health (TDH) took over primacy of the
Safe Drinking Water Act from the EPA. - ANS- True
True or False: Public Water System (PWS) officials should take a proactive approach to
terrorism. - ANS- True
What legal concept permits the owner of a well to pump as much water as desired, even
if the water is drained from beneath the land of others? - ANS- Rule of Capture
In Texas, what percentage of the total water used is accounted for by agricultural water
demand? - ANS- 57%
True or False: A rural school is an example of a non-transient non-community PWS. -
ANS- True
What does monitoring average and maximum daily water enable us to plan ahead for? -
ANS- Demand
, True or False: The Safe Drinking Water Act establishes standards for physical, chemical,
bacteriological, and radiological characteristics of drinking water. - ANS- True
Define 'potable' in relation to water safety and chlorine. - ANS- Residual
What is the responsibility of a plant operator in ensuring drinking water quality? - ANS-
Palatable
True or False: Utilities providing fire protection must have a minimum of 130 gallons of
water per person per day according to the Texas State Board of Fire Insurance. - ANS-
False
True or False: The TCEQ is the primary state regulator of water utilities. - ANS- True
True or False: All PWS, regardless of water source, must be supervised by a licensed
water works operator. - ANS- True
How do meter readers impact revenue and community relations? - ANS- Public
Who is the federal regulator of drinking water? - ANS- EPA
T/F: Duties of Distribution Operator include repairing leaks, making taps, flushing mains,
and taking radiological samples. - ANS- False (Repair leaks, Make taps, Flush mains,
Operate pumps, Take *bacteriological* samples)
Estimate the population of a service area with 1000 service connections. - ANS- 3,000
(multiply connections x 3)
T/F: The State must be notified before an existing facility is changed or after construction
of a new facility. - ANS- False (must notify *before*)
T/F: A Class 'D' license is valid for 3 years at ground and purchase water systems with
250 connections or less. - ANS- False (3 years)
T/F: The physical characteristics of water include color, taste, odor, temperature, and
turbidity. - ANS- True
What pH value indicates an alkaline or basic solution? - ANS- 7
T/F: The terms mg/L and ppm are interchangeable. - ANS- False (they are not
interchangeable)
Can suspended solids in water be filtered out? - ANS- False (they can)
